Problem with DataModelSelection
hi,
i try to implement a jsf datatable with seam @datamodel and @datamodelselection.
to generate the datamodel is no problem. but when a row is selected on the website, i cannot access to the values in @datamodelselection.
thanks for help
olaf
the javacode:
@Stateful
@Name("articleSelection")
public class ArticleSelectionBean implements ArticleSelection {
@PersistenceContext
private EntityManager em;
@DataModel(value="searchArticle")
private List searchArticle;
@DataModel(value="detailArticle")
private Article detailArticle;
private Article detailArticleInternal;
private String searchString;
@DataModel
private List selectetArticleParameter;
@DataModelSelection(value="searchArticle")
private Article selectedSearchArticle;
@Factory("searchArticle")
public String findOverview(){
System.out.println("!!! - Suchstring:" + searchString);
String searchPattern = searchString==null ? "%" : '%' + searchString.toLowerCase().replace('*', '%') + '%';
searchArticle = em.createQuery("FROM Article art WHERE lower(art.artName) like :search").setParameter("search", searchPattern).getResultList();
return "article_search_result";
}
public String findDetail(){
System.out.println("Artikelnummer:" + getSelectedSearchArticle().getArtName());
//detailArticle = em.merge(getSelectedSearchArticle());
return "article_detail";
}
public String getSearchString() {
return searchString;
}
public void setSearchString(String searchString) {
this.searchString = searchString;
}
@Remove @Destroy
public void destroy(){}
}
the Website:
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:s="http://jboss.com/products/seam/taglib"
template="template.xhtml">
<!-- content -->
<ui:define name="content">
<h1>Suchresultat</h1>
<h:dataTable columnClasses="firstColumn,secondColumn,thirdColumn"
headerClass="headerAlignment"
value="#{searchArticle}"
var="art"
rendered="#{searchArticle.rowCount>0}">
<h:column>
<f:facet name="header">Artikelbild</f:facet><h:graphicImage value="/img/article/thumbnails/#{art.artPicture}"/>
</h:column>
<h:column>
<f:facet name="header">Artikeltitel</f:facet>#{art.artName}
</h:column>
<h:column>
<f:facet name="header">ArtikelPreis</f:facet>#{art.artSalesPrice}
</h:column>
<h:column>
<f:facet name="header">Artikeldetail</f:facet><s:link value="Artikel Bestellen" action="#{articleSelection.findDetail}"/>
</h:column>
</h:dataTable>
</ui:define>
</ui:composition>
the exception:
exception
javax.servlet.ServletException: Exception while invoking expression #{articleSelection.findDetail}
javax.faces.webapp.FacesServlet.service(FacesServlet.java:121)
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
root cause
javax.faces.el.EvaluationException: Exception while invoking expression #{articleSelection.findDetail}
org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:153)
org.jboss.seam.core.Pages.callAction(Pages.java:212)
org.jboss.seam.jsf.AbstractSeamPhaseListener.callPageActions(AbstractSeamPhaseListener.java:127)
org.jboss.seam.jsf.AbstractSeamPhaseListener.beforeRender(AbstractSeamPhaseListener.java:98)
org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:50)
org.apache.myfaces.lifecycle.LifecycleImpl.informPhaseListenersBefore(LifecycleImpl.java:520)
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:342)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
